Making the nestbox
Take a strip of wood about 15mm thick. Follow the dimensions shown on the left and cut out the sections.
Lenghts: Lid 200; Back 300; Front 90; Side 200/180; Side 180/200; Floor 150
Assemble the parts as shown below. Use galvanised nails if you can, or use carpenter's glue to join the parts together. The lid may be nailed down permanently, but to facilitate cleaning, the lid can be hinged to the back with a strip of leather or rubber, e.g. old inner tyre tubing. Use a catch to keep the lid shut.
To make the wood last longer, you can apply wood preservative, but only to the outside of the box. Allow three weeks to dry, and air before placing box in its final site. DO NOT paint the box - paint is toxic and young birds in the nest may eat paint flakes.
Placing the box
Place the box at least 3-5m high on a fence or wall so that it is safe from cats and other interference. It is best to angle it slightly forward so that rainwater won't drip inside. Avoid placing the box in a position that receives direct sunlight - it can get very hot inside the box on a sunny day.
If you choose a tree, DO NOT nail the box to the trunk, but tie it with rubberised wire around the trunk. Don't make the wire too tight - remember trees grow in thickness as well as in height. Check wire every 2-3 years and loosen if it looks tight.
Cleaning the box
Each autumn clean the box out to remove feather parasites and old nesting material.
IMPORTANT: Never disturb a nestbox while it is occupied. Be happy to observe the bird family from a distance. Disturbing the nestbox may cause the parents to abandon their chicks. It is also illegal.